{
    "action": "tool_call",
    "reasoning": "I need to get distributions for the main categorical columns. I'll query Status, Certainty, Single cluster?, Country, Owner, Sector, GPU Supplier (primary), Builds Upon, and Superseded by to understand the categorical breakdowns in the dataset.",
    "tool": "query_sql",
    "args": {
        "sql": "SELECT 'Status' as dimension, Status as value, COUNT(*) as count FROM raw.ai_supercomputers WHERE Status IS NOT NULL GROUP BY Status UNION ALL SELECT 'Certainty', Certainty, COUNT(*) FROM raw.ai_supercomputers WHERE Certainty IS NOT NULL GROUP BY Certainty UNION ALL SELECT 'Single cluster?', CAST(\"Single cluster?\" AS VARCHAR), COUNT(*) FROM raw.ai_supercomputers WHERE \"Single cluster?\" IS NOT NULL GROUP BY \"Single cluster?\" UNION ALL SELECT 'Country', Country, COUNT(*) FROM raw.ai_supercomputers WHERE Country IS NOT NULL GROUP BY Country UNION ALL SELECT 'Sector', Sector, COUNT(*) FROM raw.ai_supercomputers WHERE Sector IS NOT NULL GROUP BY Sector ORDER BY dimension, count DESC",
        "purpose": "Get frequency distributions for key categorical dimensions",
        "source": "raw"
    }
}